The answer is 2%. Hope that helped
This amino acid is used by the body to produce serotonin, which is responsible for drowsiness. Moreover, foods containing carbohydrates also help produce serotonin and tryptophan amino acids found in the brain. This is the reason why you feel sleepy after eating carbohydrate-rich foods.
<span>Constriction of the afferent arteriole and dilation of the efferent arteriole</span>